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Okay, so I burned that CD-ROM image four times now - twice on my Windows
machine using CDBurnerXP, and twice on my Linux box using GnomeBaker,
using various different speeds (last one at 1x). Wouldn't it be prudent
to expect at least *one* copy to be good?
The only common things between the attempts (aside from the image in
question of course, which is ok according to md5 checksum) are (a) the
CD/DVD writer brand (both are LG, maybe even same model), and (b) the
CD-R media brand and batch.
Last time I burned a CD-R was about a year ago. The CD-Rs are from the
very same batch I used successfully back then, and they're still good to
read. Is there something like "media rot" with CD-Rs specifically
regarding being good for burning?
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On Mon, 16 Nov 2009 03:03:44 +0100, clipka <ano### [at] anonymous org> wrote:
> Okay, so I burned that CD-ROM image four times now - twice on my Windows
> machine using CDBurnerXP, and twice on my Linux box using GnomeBaker,
> using various different speeds (last one at 1x). Wouldn't it be prudent
> to expect at least *one* copy to be good?
>
> The only common things between the attempts (aside from the image in
> question of course, which is ok according to md5 checksum) are (a) the
> CD/DVD writer brand (both are LG, maybe even same model), and (b) the
> CD-R media brand and batch.
1. Some models of burners do not work well with some brands/batches of
discs.
2. Some brands/batches of discs are simply crap.
--
FE
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Fredrik Eriksson schrieb:
> 1. Some models of burners do not work well with some brands/batches of
> discs.
>
> 2. Some brands/batches of discs are simply crap.
Well, I'm using Verbatim media; I'd guess they're pretty common, and
rated at "56x" (though I guess that's for reading only), so I'd be
surprised if the burner wouldn't work with them reasonably at least at
/some/ speed (I even went as low as 1x, but ironically that's when the
burner ran into an error GnomeBaker categorized as "looks like buffer
underrun").
And as for the discs, I had used up half of the cakebox already without
any trouble.
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This looks like a case of "dirty CD/DVD recorder". Try to open it and
gently clean the lens with cotton and some alcohol for about 30 secs,
then with a dry tissue or peace of cotton "dry" it. It should work now,
if this doesn't work, then probably the device "expired". IMO LG burners
are the best they're, at least in my Country Bolivia.
Good luck.
Cheers.
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Saul Luizaga schrieb:
> This looks like a case of "dirty CD/DVD recorder".
Pretty unlikely, given that I tried on two different machines, with one
of the recorders being short of a year old and seldom used, and the
other being not even half a year old, and having been used successfully
on some DVDs just recently :-)
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clipka wrote:
> Saul Luizaga schrieb:
>
>> This looks like a case of "dirty CD/DVD recorder".
>
> Pretty unlikely, given that I tried on two different machines, with one
> of the recorders being short of a year old and seldom used,
Very fine and light dust settles on the lens exactly for this kind of
use frequency.
> and the
> other being not even half a year old, and having been used successfully
> on some DVDs just recently :-)
Maybe just recently got dirty enough to stop burning correctly.
I'd recommend to open them and clean them every 2 months or so. BTW, do
you use 'compare' option on the burning software? is really a lot of help.
Cheers.
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> This looks like a case of "dirty CD/DVD recorder". Try to open it and
> gently clean the lens with cotton and some alcohol for about 30 secs, then
> with a dry tissue or peace of cotton "dry" it. It should work now, if this
> doesn't work, then probably the device "expired". IMO LG burners are the
> best they're, at least in my Country Bolivia.
Yeh this is really rubbish - I cannot remember the number of CD/DVD drives
I've had that have just lost the ability to burn or read discs. Usually
cleaning like you say helps for a bit, but they die eventually. Maybe the
room I keep my PC in is just too dusty, or I don't use the drives enough? I
wonder if optical media will die at some point and we can just use solid
state memory?
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On Mon, 16 Nov 2009 05:00:02 +0100, clipka <ano### [at] anonymousorg> wrote:
>
> Well, I'm using Verbatim media; I'd guess they're pretty common,
Verbatim is usually the safest choice, but even they produce the
occasional bad disc.
> and rated at "56x" (though I guess that's for reading only),
The rating is always for writing.
> so I'd be surprised if the burner wouldn't work with them reasonably
> at least at /some/ speed (I even went as low as 1x, but ironically
> that's when the burner ran into an error GnomeBaker categorized as
> "looks like buffer underrun").
Burn speed can have quite an impact on the stability of the burned data.
Never burn at 56x; personally I would not go over 16x unless I planned to
only use the disc once. However, modern discs and drives generally do not
fare well with the lowest speeds either. Try to find a middle ground, like
8x or 16x depending on the burner; you do not want to push the burner to
its limits either.
> And as for the discs, I had used up half of the cakebox already without
> any trouble.
It is not unheard of to get a few bad ones in a row; it has happened to me
as well. A small hiccup in the manufacturing process probably.
--
FE
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I remember that when CDs where a new technology, they were really
reliable and expensive, I still have working CDs burned a decade ago.
They started making the CDs and now DVDs fragile to avoid piracy, it has
some sense since back-uped or pirated data will only last a few
weeks/months and won't spread much, but it ain't much of success is more
a detriment than benefit.
CD/DVDs are meant for mass storage, solid state storage for mobile
storage. People needs mass storage, solid state is just too young to
provide it at low cost still, software should be harder to copy/back-up,
so only user data can be mass-storage easily, thus no need to make
crappy media, everyone wins.
Cheers.
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How do you know burning the image did not work?
Did you use the "verify" option of your burning program and did it fail? If
so, try to eject the DVD and let it cool for a few minutes and then try
again.
Or did you just try to use the burned DVD and it did not work? Then maybe
the original image-file contains crap. Had this once, burned an image file,
tried to open it, it did not work. Did it again, still did not work. Then
looked at the image file using DAEMON tools and found that the data mastered
in the DVD-image was invalid - the image file was OK, though.
Apart from this, if store CD/DVD improperly you can damage them. Never
expose them to direct sunlight for any long period of time, never store them
where it is too hot or too dusty.
Be careful where you put them - I once stacked some CD-R's one on the other.
After a few years the cd-label marker I had used to label the CD-R diffused
from the up-side of the bottom CD surface into the underside of the CD on
top. I was lucky and the data was still readable, but this was a valuable
lesson of "how NOT to do it".
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